53213251397 has 2 divisors, whose sum is σ = 53213251398. Its totient is φ = 53213251396.

The previous prime is 53213251373. The next prime is 53213251409. The reversal of 53213251397 is 79315231235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46933322881 + 6279928516 = 216641^2 + 79246^2 .

It is a cyclic number.

It is not a de Polignac number, because 53213251397 - 2²² = 53209057093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53213251307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26606625698 + 26606625699.

It is an arithmetic number, because the mean of its divisors is an integer number (26606625699).

Almost surely, 2^53213251397 is an apocalyptic number.

It is an amenable number.

53213251397 is a deficient number, since it is larger than the sum of its proper divisors (1).

53213251397 is an equidigital number, since it uses as much as digits as its factorization.

53213251397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 41.

The spelling of 53213251397 in words is "fifty-three billion, two hundred thirteen million, two hundred fifty-one thousand, three hundred ninety-seven".